Mixing-head for fire-extinguishers.



W. W. WALKER. MIXING HEAD FOR FIRE EXTINGUISHER;

APPLICATION FILED JAN. 8. 1916.

Ru 1 0a. 1 an 9 m 1 u M. 1T1 H m a r I wvenfo'o with! W Waifltr be left-intact. D

A further OlJjQCi oi the invention 1s to con- 1 erably curved so that it 15 of substantially iiifii flhi'ij wire-Iain 731;-

froitens Q0151" I LL KER, F CAMDEN, JERSEY, AS SIGNOR-TQ MAQANDREKVS 35" 'IYQOF CAMDEN, NEWJERSEY, A CORPORATION OF NEW JERSEY.

" Minnie-HEAD non FIRE-EXTING-UISHERS.

Specification of Letters Patent. 7

Application. filed January 8, 1916; Serial No. 70,988.

am it m concern it knownithat l, lYILLIAM W. WALKER,

in Mixing-Heads for Fire- 5, cl? which the following 1s a lonielates to fire extinguish ins and particularlyto such apfibril an inflammable"liquid such as in an oil tanl Apparatus for this purpose usually inciudes means for storing near the oil tank, reservoirs containmg substances which,

when mixed together, will produce gas and foam and the apparatus operates in such a way as to deposit this foam and gas which is noxious to combustion on the surface of the liquid in il' ia z. Such apparatus also should include nxing head which is attached .1" "'11s per edge of the tank and provided a outl or spout for directing the foe 11 onto the surface oithe liquid.

A. ,ri obg of the present inven-' tion to provide a mixing head for such an apparatus eonstructed'so that it can be readily attached to the side wall of the tank, so that, int-ho event that the roof is blown off, the lire extinguishing apparatus will a head so as to prevent-any 'ng head.

. of the. invention is to head so that there will being injured by the to deliver foam onto on; and further to proso that the foam will the surface of the oil in ity, but at a relatively the burning oil. This is m conducive to the eificiency of this method oi extinguishing fires.

The invention usts in tlie'general eonstruction, features, and details of the mixing headset in the following specification while the broad scope of'my lnven tion is sct forth in appended claims.

lathellrawmg Figure l is a vertical e11 of the United states residingat is'a plan ofthe mixing head.

In the embodiment of the invention illus trated, the headfi comprises a receiver 6" hen adaptedio be used for extinguisning fires: occurring on the surface -mg oil from the tank y disturbing as little assection showing an embodiment of the inventlon and illustrating one manner in WlllCh 1t 1s applied to a tank.

which is. disposcd'toward the tank.

which is located atthe lower end of the head. This receiver iswpreferably in the Patented June 6, 1316. l

Fig. 2 is a front elevation of the. mixing head representing the same detached from the tank and looking at theside ofthe mixing head Fig. 3

form of an enlarged T connection, having oppositely disposed end walls 7 through which nipples 8 lead inwardly, said nipples connecting with delivery pipes 9 which con duct to the receiver any substances which will mix together to produce a gas and foam noxious to combustion, ,for example, these pipes may lead respectively from a reservoir containing a solution of bicarbonateyof soda, anda reservoir containing aluminum The lower portzontci sulfate in solution. the head 5 is formed-into a substantially upright conducting leg-10, the lower end of which is preferably formed into a substantially cylindrical neck'll to attach to the outlet 12' of the -T connection 6. The mixing head is preferably formed of sheet metal or similar material bent or rolled to the proper form. The leg is preferably formed of a substantially triangular forward wall 13' (see Fig. 2) and the rear wall 14.- is pref semi-c1rcular form in horizontal cross section, but enlarging toward its upper end, at which point there 1s attached a substan-- tially semi-circular bonnet 15 closed above 7 by a cover plate 16 and provided on one with a delivery spout 17 which projects sub} stantially horizontally from the side wail of the bonnet 15. This spout 17 is of substantially rectangular cross section and has a downwardly inclined upper wall '18 which its formed in the side wall of the tank to receive the mixing head, and in order to additionally secure the spout in position, I prefer to extend the flange 21 around on the vertical sides of the spout opening 23 (see Fig. 2), and I also prefer to provide the upper edge of the spout at its end with a substantially flat horizontal plate or bar 24, the ends of which extend beyond the spout and form feet 25 for attachment to the under side of the flange 26 which is usually secured along the lip of the side wall of such a tank, and located under the edge of the cover 27 of the tank. If desired, the side plates 28 of the spout may be formed of plates having overlapping edges at 29 (see Fig. 1).

In order to prevent the oil in the tank from flowing down into the head 5 in case the level of the oil should rise above the ,bottom of the spout, I prefer to provide 7 a bafile wall or dam 30 which extends transversely across the spout adjacent where it mixing head is foaming the foam passes over the upper edge of this wall 30 and flows outwardly in the spout into the tank.

It is evident that by providing a spout on such a mixing head, and attaching it to the tank as suggested, the head itself isheld away from the tank and this is very desirable, because it tends to prevent injury occurring to the apparatus from the fire before the foam begins to be delivered over the oil. The outer end of the spout 17 is preferably constructed so that it is relatively wide in a horizontal. direction and relatively narrow in a vertical direction, because this form operates to cause the spout to deliver the foam in a relatively wide thin layer onto the surface of the oil, and the upwardly enlarging cross-section of the leg 10 of the head, operates to permit the foam to expand without creating pressure or any considerable velocity in the foam as it is delivered from the spout.

As the mixing head is unattached to the cover of the tank, evidently if the cover should blow ofi in a fire, the mixing head will be left intact.

It is understood that the embodiment of the invention described herein is only one of the many embodiments my invention may take and I do not wish to be limited in the practice of the invention nor in my claims to the particular embodiment set forth.

What I claim is 1. As a new article of manufacture, a mixing head to be used in connection with a tank for holding an inflammable liquid, having a substantially upright conducting leg having means at its lower end for receiving substances which mix together to form a foam noxious to combustion, said mixing head having a cross-sectional area enlarging toward'its upper portion, and having a laterally projecting spout with means adjacent the end of said spout for attaching the same to the side wall of the tank.

2. As a new article of manufacture, a mixing head to be used in connection with a tank for holding an inflammable liquid, having a substantially upright conducting leg having means at its lower end for receiving substances which mix together to form a foam noxious to combustion, said mixing head having a cross-sectional area enlarging toward its upper portion, and having a laterally projecting spout with means adjacent the end of said spout for attaching the same to the side wall of the tank, and a baflie wall in said spout to prevent a flow of the liquid from the tank down said leg.

1 3. As a new article of manufacture, a

mixing head to be used in connection with a tank for holding an inflammable liquid, having a substantially upright conducting leg, having means at the lower end of said conductin leg for receiving substances which mix together to form.a foam noxious to combustion, said means consisting of a T having means for introducing the two substances into the Tin opposite directions, said mixing head having a cross sectional area. enlarging upwardly from said receiv ing means toward its upper portion and having a laterally projecting spout to be attached to the side wall of the tank.

4:. As a new article of manufacture, a mixing head to be used in connection with a tank for holding an inflammable liquid, having a substantially upright conducting leg, said leg having means at its lower end for receiving substances which mix together to form a foam noxious to combustlon, said head having a spout for delivering the foam in a lateral direction at the side of the head, and a bafiie wall in said spout for preventing the flow of the liquid from the tank down the leg.

5. As a new article of manufacture, a mixing head to be used in connection with a tank for holding an inflammable liquid, having a substantially upright conducting leg, said leg having means at its lower end for receiving substances to mix together to form a foam noxious to combustion, said head having a spout for delivering the foam in a lateral direction at the side of the head and means for preventing the flow of the liquid from the tank down said leg,

6. As a new article of manufacture, a mixing head to be used in connection with a tank for holding an inflammable liquid having a substantially upright conducting leg with a substantially flat forward wall to be disposed adjacent to the tank and having a curved rear wall, said. leg increasing in horizontal cross section in an upward direction, inlet means at the lower end of said leg to admit substances to mix together and form a foam to rise and expand in said leg, a'

bonnet connected'with the upper end of said leg and having a laterally proJecting spout with means for attaching the same to the side of the tank. q

7. As a new article of manufacture, a

mixing head to be used in connection with a tank for holding an inflammable liquid, said head having a horizontal cross section enlarging from its lower end-toward its upper aid head having a laterally projecting spout having means for attaching the same to the side Wall of a tank and below the cover of the tank.

In testimony whereof I have hereunto 15 set my hand in presence of two subscribing witnesses.

WILLIAM W. WALKER.

Witnesses:

W. E. RANSOM, HARRY O. Kosnn. 

